SINGAPORE - Presidential hopeful Dr Tony Tan has refuted online allegations that one of his sons received preferential treatment during National Service (NS). In a statement posted last night on his Facebook page, Dr Tan - who served as Minister for Defence from 1995 to 2003 - said his son, Dr Patrick Tan, served the latter part of his NS during the tenure. "My sons all completed their National Service obligations fully and I have never intervened in their postings," he said. Having spent over three decades in public service, Dr Tan said he is "acutely aware of the scrutiny to which public figures are subjected". "Responsibility and integrity governed my choice to serve Singapore for over three decades, motivated me to run for President, and are values I have lived by and instilled in my family," he added. Dr Tan said he is "deeply disappointed" by the rumours. "I am confi...